PITTSFIELD — Two city firefighters were hurt battling a two-alarm fire at a vacant home early Sunday morning.

Around 1:30 a.m., the Pittsfield Fire Department responded to a 911 call about flames visible from an unoccupied duplex at 34 Boylston St.

"The fire was blowing through the roof," said Deputy Fire Chief Daniel Garner. "As soon as our guys got there, the building had been compromised."

All 18 firefighters on duty were on the scene and quickly contained the blaze that heavily damaged the roof and attic. Garner said two firefighters were treated for minor injuries at Berkshire Medical Center and are back on the job.

The State Fire Marshall Office is assisting city fire investigators in finding out what sparked the blaze that began in the attic.

Garner noted the two-family house appeared to be under renovation and was in the process of being sold by a home mortgage lender.

Contact Dick Lindsay at 413-496-6233